author
Best known today for a hard-to-find mystery and a public-domain Western, this early 20th-century writer left behind stories full of danger, suspense, and rough-edged adventure.

by Dean L. Heffernan
Little is firmly documented online about Dean L. Heffernan, but the surviving record shows an American fiction writer whose work appeared in the early 20th century. Project Gutenberg lists The Riders of Ramapo Pass, originally published in 1919 by The Frank A. Munsey Company, and booksellers also identify Heffernan as the author of Murder at Sunset Gables, a mystery first published by Duffield and reissued by Benziger Brothers in 1933.
Those two titles suggest a writer comfortable in more than one popular mode: frontier adventure on one hand and a classic whodunit on the other. The Riders of Ramapo Pass leans into action, justice, and romance in a lawless Western setting, while Murder at Sunset Gables is remembered as a grand-estate murder mystery.
Because biographical sources on Heffernan are scarce, many personal details about his life remain unclear. What does come through is a taste for fast-moving, accessible storytelling in the tradition of early American popular fiction.